Glass-mold



(No Model.)

B. G. A. WITT.

GLASS MOLD.

No. 360,076. Patented Mar. 29, 1887.

ATTORNEY WITNESSES @WK/ NITED STATES PATENT OFFICE.

RICHARD G. A. l/VITT, OF MINNEAPOLIS, MINNESOTA.

GLASS-MOLD.

SPECIFICATION forming part of Letters Patent No.360,076, dated March 29, 1887.

Application filed June 1,1886. Serial No. 203,579. (No model.)

To all whom it may concern.-

Be it known that I, RICHARD G. A. Wrtrr, a citizen of the United States, residing at Minneapolis, county of Hennepin, State of Minnesota, have invented a new and useful Glass- Mold, of which the following is a specification.

My invention was made especially for application in carrying out the process of manufacturing large glass globes, as is fully described in an application for Letters Patent made by me of even date herewith. The essential step of that process consists in blow ing and simultaneously revolving the glass metal in a dampened wooden mold, such as is herein specifically described.

In the accompanying drawings, Figure I is.

a perspective view showing the mold open and revealing the design. Fig. II is a perspective showing the mold closed, as it appears while the globe is being blown. Fig. III is a perspective showing its cap-board.

A A are two blocks hinged together vertically in the rear, and containing the two halves of the mold shaped to the design for the globe or other article, so that when closed a mold for a complete globe is obtained.

a c are handles by which the assistant holds the mold in position when the globe is being. blown.

(Z d d are copper wires placed within the in terior of the globe, wherever desired, to secure sharply-defined curves, such as for the lips and rims of globes to be placed on burners. These copper wires preserve the form of the mold, which would otherwise become more or less burned out by the hot glass.

6 c e e are holes for escape of the steam, air, &c., when the globe is being blown.

F is the cap-board, which is provided with a slot, and slightly-enlarged orifice h. The

function of this ca-pboard is to close the mouth of the mold sufficiently to prevent the glass metal from bulging upward out of the mold, and serves to give the proper shape to the upper cap or section of the globe, which is afterward to be cracked off to make the proper opening at top of the globe.

The slot 9 is to allow the cap-board to inclose the blowpipe, and the orifice It to allow room for the glass-blower to manipulate his blow-pipe, and for the formation of the upper cap to the globe. When in use, the mold having been plunged in a water-bath to dampen it, the assistantboy grasps the handles and closes the two parts of the mold on the hot-glass metal, there holding it with one hand, while with the other he places and holds the cap-board over the mouth ofthe mold.

The process and product herein partially disclosed l have claimed in an application for Letters Patent of even date herewith.

That I claim, and desire to secure by Letters Patent 01' the United States in this application, is as follows:

1. Metallic wires within a wooden mold, to give sharpness of outline and prevent burning out of the mold.

2. A wooden mold for manufacture of glass globes, having copper or other metallic wires on the interior, for the purpose named, and provided with apertures for the escape of steam, &c., from the interior of the mold when the globe is being blown.

3. The cap-board F, provided with slot g, and slightly enlarged orifice h, for suitably closing the mouth of the mold and forming top section of globe, substantially as described, for the purpose set forth.

4. The combination of the mold, substantially as described, with the cap-board, substantially as described, for the purpose set forth.

5. The mold described, composed of parts A A, hinged together and provided with the hollow interiors B B, out to the desired design and provided with the metallic wires (1 d, and air and steam holes 6 e e c, in combination with the cap-board F, provided with slot g, and orifice h, substantially as described, for the purpose set forth.

RICHARD G. A. \VIT' Witnesses:

JOSEPH A. Prmrrmz, FRI Z L. REIMAN. 

